Transmitted waveform optimization method based on nonlinear frequency modulation signal appoximating expected power spectrum

A technology of non-linear frequency modulation and transmitting waveforms, applied in the field of radar, can solve the problems of low optimization efficiency, large amount of calculation, and difficulty in meeting the real-time requirements of radar, and achieve good quality of transmitted signals, fast optimization speed, and real-time performance the effect of the requirements

Pending Publication Date: 2020-12-18
XIDIAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above methods require a large amount of calculation, the optimization efficiency is not high, and it is difficult to meet the real-time requirements of the radar.

Method used

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  • Transmitted waveform optimization method based on nonlinear frequency modulation signal appoximating expected power spectrum
  • Transmitted waveform optimization method based on nonlinear frequency modulation signal appoximating expected power spectrum
  • Transmitted waveform optimization method based on nonlinear frequency modulation signal appoximating expected power spectrum

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Effect test

Embodiment 1

[0050] See figure 1 , figure 1 It is a schematic diagram of a transmission waveform optimization method based on a nonlinear frequency modulation signal approaching a desired power spectrum provided by an embodiment of the present invention, including:

[0051] S1: Obtain the power spectrum and bandwidth of the desired signal, and divide the bandwidth of the desired signal into several parts to obtain several sub-bandwidths, including:

[0052] First, given the power spectrum of the desired signal as P 0 , the bandwidth is B 0 .

[0053] Then, according to the energy equal division principle, the bandwidth of the desired signal is divided into several sub-bandwidths. Specifically, according to the principle of equal energy division, the bandwidth of the desired signal is divided into N subbandwidths B 1 ,B 2 ,...,B N , and satisfy

[0054] S2: Obtain the non-linear frequency modulation sub-signal according to the power spectrum and bandwidth of the desired signal.

...

Embodiment 2

[0100] The effects of the transmission waveform optimization method based on the nonlinear frequency modulation signal approaching the expected power spectrum provided by the first embodiment will be further described below through simulation experiments.

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Abstract

The invention discloses a transmitted waveform optimization method based on a nonlinear frequency modulation signal appoximating expected power spectrum; and the method comprises the steps: obtainingthe power spectrum and bandwidth of an expected signal, dividing the bandwidth of the expected signal into a plurality of parts, and obtaining a plurality of sub-bandwidths; obtaining a nonlinear frequency modulation sub-signal according to the power spectrum and bandwidth of the expected signal; in each sub-bandwidth, using the power spectrum of the power spectrum appoximating expected signal ofthe non-linear frequency modulation sub-signal in the sub-bandwidth, and obtaining a fitting signal; and approximating the power spectrum of the expected signal by adopting the power spectrum of the fitting signal to obtain an optimized transmitting signal. The transmitted waveform optimization method based on the nonlinear frequency modulation signal approximation expected power spectrum is goodin approximation degree, the obtained optimized transmitted signal is good in quality, the calculated amount of the process is small, the optimization speed is high, and the requirement of radar for real-time performance can be met.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a transmission waveform optimization method based on a nonlinear frequency modulation signal approaching an expected power spectrum. Background technique [0002] Radar is an electronic device that uses radio to find targets and determine their spatial positions. With the development of radar technology, radar systems have been widely used in many fields of military and civilian use. Conventional radars generally have a directional narrow beam. In order to ensure that all targets in the expected airspace can be effectively detected, the narrow beam is required to scan the airspace quickly and reciprocatingly; for the detected targets, the beam pointing can be adjusted according to the movement of the target for target tracking; The discovered targets emit specific signals for radar imaging, target classification and identification, etc. According to the requirements ...

Claims

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Application Information

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IPC IPC(8): G01S7/282G01S7/35
CPCG01S7/282G01S7/35Y02D30/70
Inventor 纠博杨宇高青松黄金杰谢少鹏
Owner XIDIAN UNIV
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